Update protocol type (#92)

diff --git a/ebpf/accesslog.proto b/ebpf/accesslog.proto
index d64140a..324094b 100644
--- a/ebpf/accesslog.proto
+++ b/ebpf/accesslog.proto
@@ -333,7 +333,8 @@
 
 enum AccessLogProtocolType {
     TCP = 0;
-    HTTP = 1;
+    HTTP_1 = 1;
+    HTTP_2 = 2;
 }
 
 message EBPFTimestamp {